Smoke-consuming furnace



(No Model.) Y 3 Sheets-'-Sheet 1.

T. DARK,.Sr. SMOKE GONSUMING FURNAUEr No. 519,079. Patented May 112394'. i

- N4 I inveizorrm -(No Model'.) ,3 She'ets-- Sheet'2:

T. DAR srf SMOKE consume I'URNAGE. No. 519,079. Patented May 1,1894,

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T.'DA RK,Sr. Y SMOKE GONSUMING FURNACE. Patented May 1, 1894.

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SYMOKE-CONSUMING FURNACE.

SPECIFICATION forming part of Letters Patent No. 519,079, dated May{1894.

- Application filed November 28, 1893. Serial No. 492,217- (No model.)

To all whom it may concern.-

l 3e 1t known that I, THoMAs DARK, Sn, a c tizen of the United States,residing at the c1tv of Buffalo, in the county of Erie and State of NewYork, have invented a new and useful Improvement in Smoke-ConsumingFurnaces, of which the following is a specification. ThlS lnventionrelates to a smoke consuming furnace and has the object to produce 'afurnace of this character which is simple and durable in constructionand which will effect- 1lially burn thesmoke without checking the In theaccompanying drawings consisting of three sheets :Figure 1 is a frontelevation of afurnace provided with my improvements. Fig 2 1s a verticaltransverse section thereof, in l1 ne 2-2, Fig. 3. Fig. 3 is alongitudinal sectional elevation thereof. Fig. 4 isa vertical section,on an enlarged scale, in line 4-4, Fig. 5. Fig. 5 is a horizontalsection, on an enlarged scale, in line 5-5, Fig. 3. Figs. 6

and 7 are fragmentary perspective views of the retort and the feedchest.

Like letters of reference refer to like parts in the several figures.

A represents the front plate of the furnace, B the side walls, 0 thegrate arranged in the fire place or combustion chamber between the sideWalls, D the fire bridge arranged at the rear end of the grate and E theboiler.

F represents retorts or mixing chambers ar ranged lengthwise in the sidewalls of the furnace and extending from the bridge forwardly abouttwo-thirds of the length of the fire place. The retorts are preferablyrectangular in cross section, and their inner sides are arranged fiushwith the inner surface of the side walls so that the same are directlyexposed to the fire in the combustion chamber. Each retort is providedWithin its inner side with a longitudinal row of openings f.

G G represent the two sections of a cross pipe whereby the rear ends ofthe retorts are connected. These sections are arranged in the firebridge and have their upper sides arranged flush with the top of thebridge and provided with a longitudinal row of openings 9. The outerends of the cross pipe sections are rigidly secured to the rear ends ofthe retorts, and communicate therewith, while-their inner ends areconnected by a sliding joint to permit the sections to contract andexpand as the'temperature inthe furnace varies. This jointv consistspreferably of an enlargement or hood it formed on the end of one of thesections, a flange 72/ formed on the end ofthe other section andarranged in said enlargement, and a packing k of fire clay arrangedbetween the inner side of the enlargement and the adjacent section, inrear of its flange.

I represents feed chests whereby the fuel is supplied to the retorts andwhich are arranged lengthwise in the side walls. These retorts extendfrom the front plate of the furnace to the front ends of the retorts andhave their inner sides arranged flush with the inner sides of the sidewalls of the furnace. The feed chests are preferably rectangularin'cross section and are connected at their rear ends with the retortsby sliding joints to permit the retorts and chests to expand andcontract. Each of these joints is substantially the same as the jointbetween the sections of the cross pipe and is constructed as follows:

2 represents an outwardly projecting flange formed on the rear end ofthe feed chest and extending along the top, bottom and outer sidethereof.

i is a notch or recess formed in the end of the chest adjacent to itsinner side.

J is a U shaped hood or enlargement formed of a top plate j, a bottomplate j, and an outer plate 7' j is a tenon or lug formed on the frontend of the retort adjacent to its inner side. The hood of the retortpasses over the flanged rear end of the feed chest and the lug .oftheretort entersthe recess of the chest, thereby holding the chest andretort against lateral displacement with reference-to each other.

7' represents a packing of fire clay arranged between the hood and thechest in front of the flange 0f the latter whereby a practically tightjoint is formed between the retort and chest. This construction of jointenables the inner sides of the chests and retorts to be arwith twolongitudinal partitions which divide it into an inner channel 70, anintermediate channel It and an outer channel L represents receivingheads which receive the fuel and deliver it to the feed chests. Each ofthese heads is secured to the front plate of the furnace and is dividedby partitlonsinto an inner chamber Z, an intermediate chamber Z and anouter chamber Z The inner, outer and intermediate chambers of thereceiving head are in line with the corresponding channels respectivelyof the feed chests, and are connected therewith by openings formed inthe front plate. The chest and head are secured to opposite sides of thefront plate and firmly drawn against the same by bolts 97?. passingthrough ears formed on the chest and head-and through the front plate.

N represents a main steam pipe connected with the dome of the boiler andprovided with branch pipes or 02 connected respectively with the innerchambers Z of the receiving heads L. In each of these steam pipes is aUpon opening these valves, the

valve n. steam passes into the inner chambers of the receiving heads,thence through the inner channels of the feed chests and thence into theretorts. The inner side of each feed chest, being exposed to the heat ofthe fire place, the steam in passing through the inner channel thereof,is superheated before it enters the retort.

0 represents air supply pipes connected with the intermediate chambersof the receiving heads. Upon opening the valves 0 of these air pipes,air is admitted to the same and passes successively through theintermediate chambers, the intermediate channels of the feed chest andinto the retorts. The air in passing through the intermediate channelsis heated before entering the retorts, by the steam in the adjacentinner channels.

P represents perforated spray pipes whereby oil, gas or similar fuel isdelivered into the retorts. These spray pipes are arranged lengthwise inthe retorts and the outer channels of the feed chests, and are providedat their rear ends with angular branches 19 extending into the sectionsof the cross pipe. The front ends of these spray pipes aresecured in theouter openings of the front plate, preferably by a screw joint, and openinto the outer chambers of the receiving heads.

Q represents fuel supply pipes which connect with the upper portion ofthe outer chambers of the receiving heads. Upon opening the valves q ofthese fuel supply pipes, the gas, oil or other fuel passes into saidouter chambers, thence into the spray pipes, thence through theperforations of said pipes into the retorts and the cross pipes G. Thefuel issues from the spray pipes in a finely divided state and iscommingled in the retorts and the cross pipes with the heated air andthe superheated steam forming a gas. As the inner sides of the retortsare exposed to the heat of the fire place the fuel, air and steam in thesame are intensely heated, which assists in forming an intimate mixtureof the same, thereby producing a gas having highly combustiblequalities. The gas formed in the retorts passes through the perforationsof the latter and the cross pipe and is delivered in jets over the sidesand the rear portions of the fire place, where it is ignited by theflames and consumes the smoke as it rises from the fire on the grate.

This construction of smoke consuming furnace does not require thefurnace to healtered in any respect, all of the parts be1ng built in themasonry, which permits the furnace to be used in the ordinary way, if byaccident the smoke consuming apparatus should become inoperative.

By the use of this smoke consumer, the fire is not checked becausesufficient air is supplied to the retort to consume the fuel withoutdetracting from the draft of the furnace fire.

In order to permit of cleaning the perforations in the spray pipes,retorts and cross pipes, blow-oft pipes R are connected with the outerchambers of the receiving heads L. Upon opening the valves r oftheseblow-oif pipes and the valves of the steam p1pes and closing thevalves of the air and fuel plpes, the steam unmixed with oil or air, isforced partly through the perforations of the cross pipes and theretorts into the fire place and partly through the perforations of thespray pipes, into the latter whence it escapes through the blow-offpipes, thereby efifectually clearing these passages of any accumulationsof grit or sediment.

I claim as my invention- 1. In a furnace, the combination with the sidewalls of the fire-place, of retorts arranged lengthwise in the sidewalls and having perforations which open into the fire-place, a crosspipe connecting the rear portions of the retorts and having perforationsopening into the fire-place, and conduits for the gas forming materialsconnected with said retorts,

substantially as set forth.

2. In a furnace, the combination with the side Walls and thefire-bridge, of retorts arranged lengthwise in the side walls and havingperforations which open into the fire-place, a cross pipe connecting therear ends of the retorts, arranged in the fire-bridge and hav ingperforations opening into the fireplace, and conduits for the gasforming materials connected with said retorts, substantially as setforth.

3. In a furnace, the combination with the side walls and the firebridge, of perforated retorts arranged lengthwise in the side walls, anda perforated cross pipe arranged in the fire bridge, and composed of twosectionshaving their outer ends connected withthe rear ends of theretorts and their inner ends connected by a sliding joint, substantiallyas set forth.

4:. In a furnace, the combination with the ICC retorts arrangedlengthwise in the side walls, a perforated cross pipe arranged in saidfire bridge and consisting of two sections con-- nected at their outerends to the rear ends of the retorts, a hood or enlargement formed at.

the inner end of one section, a flange formed at the inner end of theother section, and arranged 1n said hood or enlargement, and a packingarranged between the adjacent port1o n of the sections, substantially asset forth.

0. In a furnace, the combination with the fire-place, of a perforatedretort arranged in the wall of the fire-place, a feed chest alsoarranged in said wall and provided with independent channels connectedwith said retorts, whereby the gas forming materials are independentlyheated in said chest preparatory to entering the retorts, forth.

6. In a furnace, the combination withthe side walls of the fire place,of perforated retorts arranged lengthwise in said walls and feed chestsarranged lengthwise in the side walls, and having theirinner sides flushwith the inner surface of the side walls, said chests opening with theirrear ends into the retorts and conducting the gas forming materials 1ntothe same, substantially as set forth.

7. In a furnace, the combination with the side walls of the fire place,of retorts arranged lengthwise in said walls and feed chests arranged inthe side walls and connected at their rear ends with the front ends ofthe regortls1 by a sliding joint, substantially as set 8. In a furnace,the combination with theposed of top, bottom and outer plates andin-'"er lugs, of feed chests arranged lengthwise 1n the side walls, flushwith the inner surface of the latter, and provided at their rear endswith flanges extending along their upper, lower and outer sides and withinner recesses, the flanges of the chests being arranged in the hoods ofthe retorts and the lugs of the latter being arranged in the recesses ofthe chests, substantially as set forth.

9. In a furnace, the combination with the side walls of the fire place,of retorts arranged lengthwise in said walls,'feed chests arranged 1nthe side walls and connected at their rear substantially as set I endswith the retorts and each having longitudinal partitions dividing thesame into an inner steam channel an outer fuelrchannel and anintermediate air channel, substantially as set forth.

10. In a furnace, the combination with the side walls of the fire place,of retorts arranged in said walls and having perforations opening intothe fire place, feed chests having their rear ends connected with thefront ends of the retort-s and each provided with longitudinalpartitions dividing the same into an inner channel, an intermediatechannel and an outer channel, receiving heads having inner, intermediateand outer chambers which communicate respectively with the inner,intermediate and outer channels of the feed chests, steam, air and oilor gas supply pipes connected respectively with the chambers of thereceiving heads, substantially as set forth.

11. In a furnace, the combination with the side walls of the fire placeand the fire bridge, of retorts arranged in said walls and havingperforations opening into the fire place, a perforated cross pipearranged in the fire bridge and connecting the rear ends of the retorts,feed chests arranged in the side walls and having air and steam channelsopening into the front ends of the retorts, and perforated spray pipesarranged in the retorts and cross pipe and connected with the oilor gassupply, substantially as set forth.

12. In a furnace, the combination with the side walls of the fire place,of retorts arranged in said walls and having perforations opening intothe fire place, feed chests having their rear ends connected with thefront ends of the retorts and each provided with longitudi nalpartitions dividing the same into an innor channel, an intermediatechannel and an outer channel, receiving heads having inner, intermediateand outer chambers which communicate respectively with the inner.intermediate and outer channels of the feed chests, steam, air and oilor gas supply pipes connected respectively with the chambers of thereceiving heads, and blow-0E pipes connected with the outer chambers ofsaid receiving heads, substantially as set forth.

Witness my hand this 21st day of November, 1893;

, THOMAS DARK, SR.

-Witnesses:

THEO. L. POPP, J NO. J. BONNER.

